So many things.

• queer phobic. I'm not queer but many of my friends are. I don't need that negativity in my life.
• smoker. Maybe a pass if they are actively trying to quit. Maybe. Most active smokers I've known have kind of been assholes about it, though.
• littering. Sometimes combined with the above when smokers throw their butts on the ground
• being a jerk about people having healthy hobbies. Like, just let someone enjoy some video games or bird watching or whatever. I can't with people who are like "omg that's so childish you still [play games/read fiction/go to the zoo/whatever]?".
• being anti-consent. I've met a few women who are like "just do stuff and I'll tell you if I don't like it" and I'm like lady there's some "stuff" that can be done that by the time it's happening , the damage is done. Let's just have a conversation about what we like and what our boundaries are.